Subsurface well apparatus and method

Details Subsurface well apparatus and method Subsurface well apparatus and method

1973-06-11

1981-08-18

Leppink, James A.

Wells

Valves, closures or changeable restrictors

166322, E21B 2300, E21B 4300

Patent

active

042841410

ABSTRACT:
Subsurface well apparatus and method of operating same, wherein a controlled ball valve or closure means is provided, with means for mounting same in a well tubing for normally opening and closing flow through the well tubing, and wherein a fluid flow control assembly having a replacement ball valve therewith is adapted to be dropped in or otherwise lowered through the well tubing so as to position same above said controlled ball valve for subsequent operation of said replacement valve to thereafter serve as a replacement for said controlled valve.

REFERENCES:
patent: 3378080 (1968-04-01), Fredd
patent: 3477507 (1969-11-01), Page, Jr.
patent: 3603394 (1971-09-01), Raulius
patent: 3763932 (1973-10-01), Dinning

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